Paris: French police searched the Paris apartment of IMF chief Christine Lagarde on Wednesday as part of an investigation into her awarding of a 2008 arbitration payment to a businessman supporter of ex-president Nicolas Sarkozy, her lawyer said.

Lagarde, who at the time was Sarkozy's finance minister, has repeatedly denied wrongdoing in ending a judicial battle against billionaire Bernard Tapie and instead opting for arbitration.

Investigating magistrates suspect her of complicity in embezzling public funds after she overruled objections from advisers to proceeding with the controversial 285 million euro payment (USD 367 million) to Tapie.

"This search will help uncover the truth, which will contribute to exonerating my client from any criminal wrongdoing," Lagarde's lawyer, Yves Repiquet, told.

It was conducted a day after France's budget minister resigned after being targeted in a tax fraud inquiry.

Socialist President Francois Hollande came to power last May vowing to crack down on the cozy relationships between politicians and businessmen he said were rife under Sarkozy.

Lagarde was in Frankfurt and not in her Paris flat at the time of the search, a spokesman for the IMF chief said.